import {TestBed} from "@angular/core/testing";
import {WorkerService} from "./worker.service";
import {Worker} from "./models/worker";
import {HttpClientTestingModule, HttpTestingController} from "@angular/common/http/testing";
import {HttpClient} from "@angular/common/http";
import {HttpErrorHandler} from "../http-error-handler.service";

describe('WorkerService (with mocks)', () => {
  let httpClient: HttpClient;
  let httpTestingController: HttpTestingController;
  let workerService: WorkerService;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [ HttpClientTestingModule ],
      providers: [ WorkerService, HttpErrorHandler ]
    });

    httpClient = TestBed.get(HttpClient);
    httpTestingController = TestBed.get(HttpTestingController);
    workerService = TestBed.get(WorkerService);
  });

  afterEach(() => {
    httpTestingController.verify();
  });


  describe('#getWrokersInDelegation', () => {
    let expectedWorkers: Worker[];

    beforeEach(() => {
      workerService = TestBed.get(WorkerService);
      expectedWorkers = [
        { id: 1, name: 'Adam', surname: 'Kowalski', country: 'Niemcy', city: 'Berlin', client: { name: 'Daleki', address: 'testowy'}, startDate: new Date(Date.UTC(2017, 1, 1, 14, 0, 0)), endDate: new  Date(Date.UTC(2017, 2, 2, 15, 0, 0))},
        { id: 2, name: 'Piotr', surname: 'Nowak', country: 'Słowacja', city: 'Bratysława', client: { name: 'Daleki2', address: 'testowy2'}, startDate: new Date(Date.UTC(2017, 5, 4, 14, 0, 0)), endDate: new  Date(Date.UTC(2017, 8, 4, 15, 0, 0))}
      ] as Worker[];
    });

    it('should return expected heroes (called once)', () => {
      workerService.getWrokersInDelegation().subscribe(
        workers => expect(workers).toEqual(expectedWorkers, 'should return expected workers'),
        fail
      );

      const req = httpTestingController.expectOne(workerService.getWorkersInDelegationUrl);
      expect(req.request.method).toEqual('GET');

      req.flush(expectedWorkers);
    });

    it('shuld be OK returning no heroes', () => {
      workerService.getWrokersInDelegation().subscribe(
        workers => expect(workers.length).toEqual(0, 'should have empty heroes array'),
        fail
      );

      const req = httpTestingController.expectOne(workerService.getWorkersInDelegationUrl);
      req.flush([]); // Respond with no workers
    });

    it('should turn 404 into a user-friendly error', () => {
      const msg = 'Coś poszło nie tak; Spróbuj ponownie później'
      workerService.getWrokersInDelegation().subscribe(
        wokrers => fail('expected to fail'),
        error => expect(error).toEqual(msg, 'should be the same message')
      );

      const req = httpTestingController.expectOne(workerService.getWorkersInDelegationUrl);
      //respond with 404 and the error message in the body
      req.flush(msg, { status: 404, statusText: 'Not found' });
    });
  })
});